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Predictor

jxl_encoder::modular

Enum Predictor 

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#[repr(u8)]
pub enum Predictor {

Show 14 variants    Zero = 0,
    Left = 1,
    Top = 2,
    Average0 = 3,
    Select = 4,
    Gradient = 5,
    Weighted = 6,
    TopRight = 7,
    TopLeft = 8,
    LeftLeft = 9,
    Average1 = 10,
    Average2 = 11,
    Average3 = 12,
    Average4 = 13,

}
Expand description

Available predictors for modular encoding.

Variants§

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Zero = 0

Always predicts 0.

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Left = 1

Uses the left neighbor (west).

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Top = 2

Uses the top neighbor (north).

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Average0 = 3

Average of left and top.

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Select = 4

Select between left/top based on top-left.

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Gradient = 5

Gradient: left + top - topleft (clamped).

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Weighted = 6

Weighted average favoring left.

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TopRight = 7

Top-right neighbor.

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TopLeft = 8

Top-left neighbor.

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LeftLeft = 9

Left-left neighbor (2 pixels left).

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Average1 = 10

Average of west and north-west: (W + NW) / 2

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Average2 = 11

Average of north and north-west: (N + NW) / 2

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Average3 = 12

Average of north and north-east: (N + NE) / 2

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Average4 = 13

Weighted average: (6N - 2NN + 7W + WW + NE2 + 3NE + 8) / 16

Implementations§

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impl Predictor

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pub const NUM_SIMPLE: usize = 14

Number of simple predictors (excluding weighted/variable).

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pub fn all_simple() -> &'static [Predictor]

Returns all simple predictors.

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pub fn predict(self, channel: &Channel, x: usize, y: usize) -> i32

Predicts the value at (x, y) using this predictor.

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pub fn predict_from_neighbors(self, n: &Neighbors) -> i32

Predicts from pre-gathered neighbor values.

Trait Implementations§

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impl Clone for Predictor

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fn clone(&self) -> Predictor

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Predictor

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for Predictor

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fn default() -> Predictor

Returns the “default value” for a type. Read more
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impl PartialEq for Predictor

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fn eq(&self, other: &Predictor) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for Predictor

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impl Eq for Predictor

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impl StructuralPartialEq for Predictor

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.